Stirring shaft for stirrer

The invention relates to a stirring shaft for a stirrer. A stirring ball is arranged at the middle part of a stirring rotary blade; the stirring ball is formed by a plurality of metal rods along the latitude line of a sphere in interval arrangement; a shaft main body penetrates through an upper pole point and a lower pole point of the stirring ball; when the shaft main body rotates, the stirring rotary blade under the stirring ball can upwards and rotationally push and mix the materials; the materials can collide with the stirring ball rotating at high speed along with high-speed rotation, andare subjected to secondary rotation, stirring and mixing by the stirring ball; one part of materials enter the stirring ball through gaps of among the metal rods and come out from gaps of the upper end of the stirring ball; then, the materials enter the stirring rotary blade above the stirring ball; or the materials are oppositely pushed by the stirring rotary blade from top to bottom. Due to thearrangement of the stirri